Sonia Bogos

PHD Student

+41 21 69 38127

About Me

I am a 5th year PhD student in the LASEC laboratory at EPFL, under the supervision of Prof. Serge Vaudenay.

Research-wise, I enjoy all sides of cryptography and security! My doctoral studies are focused on the algorithmic study of the Learning Parity with Noise (LPN) and the Learning With Error (LWE) problems.

My photo


"Education is the most powerful weapon which you can use to change the world." (Nelson Mandela)

Doctoral Assistant

School of Computer and Communication Sciences, EPFL, Switzerland
September 2012 - present

Master in Computer Science

School of Computer and Communication Sciences, EPFL, Switzerland

Master thesis: Case study on lattice-based cryptography, LASEC Laboratory - EPFL

Overal GPA


September 2010 - August 2012

Bachelor of Computer Science

Faculty of Computer Science, Alexandru Ioan Cuza University, Iasi, Romania

BSc thesis: Model Checking on Rewrite Systems

Overall GPA


September 2007- July 2010

Erasmus studies

École normale supérieure de Cachan, France
September 2009 - February 2010

Main Publications

"Nothing ever becomes real till it is experienced." (John Keats)

  1. Optimization of LPN Solving Algorithms

    Sonia Bogos, Serge Vaudenay

  2. Crypanalysis of a Homomorphic Encryption Scheme

    Sonia Bogos, John Gaspoz, Serge Vaudenay

  3. How to Sequentialize Independent Parallel Attacks?
    Biased Distributions Have a Phase Transition

    Sonia Bogos, Serge Vaudenay

  4. On Solving Lpn using BKW and Variants

    Sonia Bogos, Florian Tramèr, Serge Vaudenay

  5. Primeless Cryptography

    Sonia Bogos, Ioana Boureanu, Serge Vaudenay

  6. Cryptanalysis of the Double-Moduli Cryptosystem

    Sonia Bogos, Serge Vaudenay


"The roots of education are bitter, but the fruit is sweet." (Aristotle)

I supervised eight students for research-oriented and implementation-oriented semester projects.

I was a Teaching Assistant for various classes. In particular:

Cryptography and Security

(taught by Prof. Serge Vaudenay)
Autumn 2013, Autumn 2014, Autumn 2015, Autumn 2016

Advanced Cryptography

(taught by Prof. Serge Vaudenay)
Spring 2014, Spring 2016

Student Seminar: Security Protocols and Applications

(taught by Prof. Serge Vaudenay and Dr. Philippe Oechslin)
Spring 2015

Initiation à la programmation en C++

Initiation à la programmation en Java

(taught by Dr. Jean-Cédric Chappelier and Dr. Jamila Sam on Coursera)
Spring 2013

Programmation Orientée Systéme (C/Unix/Perl )

(taught by Dr. Jean-Cédric Chappelier)
Spring 2011, Spring 2012


“I'm a greater believer in luck, and I find the harder I work the more I have of it.” (Thomas Jefferson)

Google 2016 Anita Borg Scholarship (2016)
Outstanding Teaching Assistant award (2014)
Excellence scholarship EPFL - master studies (2010-2012)
Silver and bronze medal at Ariel - Internet Olympiad Math for Students (2009)
Faculty Annual Diploma for Academic Performance - 1st prize (2009)
Faculty Annual Diploma for Academic Performance - 1st prize (2008)
Bronze medal at Romanian National Olympics in Mathematics (2006)


"Do not fear mistakes. You will know failure. Continue to reach out." (Benjamin Franklin)

I did reviews as a subreviewer for: Financial Crypto'16, SCN'16, FSE'16, Crypto'15, Financial Crypto'15, Asiacrypt'15, CT-RSA'15, ProvSec'15, Eurocrypt'14, Financial Crypto'14, Asiapkc'14, FSE'14, Asiacss'13, CT-RSA'13.

Work Experience

"Pleasure in the job puts perfection in the work." (Aristotle)

  1. Doctoral Assistant

    Research grant: Designing a Post-quantum Fully Homomorphic Encryption Scheme

    Supervisor: Prof. Serge Vaudenay

  2. Internship

    Anti-piracy protection for mobile applications

    ELCA, Lausanne

  3. Part-time Web Developer

    PHP developer at Novano SARL Lausanne

    Weber Lighting website

    Artificial Intelligence Laboratory website

Techinical Skills and Hobbies

Programming: C/C++ (Linux client/server & concurrent model), C#, Java (J2SE desktop, JSP), PHP, Python
Functional programming: Haskell, OCaml
Hobbies: cycling, hiking, reading

Get in touch

"Communication - the humman connection - is the key to personal and career success." (Paul J. Meyer)

Contact Info

    Station 14 -INF 239
    CH-1015 Lausanne, Switzerland
  • +41 21 69 38127
  • soniamihaela[dot]bogos[at]epfl[dot]ch